Very space constrained WC setup questions

[Machupo]

So, I'm building a very tiny shoebox system for gaming -- I just need to be sure that this loop can handle what I'm going to put on it (vid card and proc will be maxed). Cost is not an issue, I'd prefer less noise, but understand I'll need some to get this done.

Loop:
Some, as yet unspecified, socket 1156 block on an 875k
eK FC-6990 block
no chipset watercooling (have a copper replacement hs for the stock one)
mcp-355 pump
black ice GT stealth 2x140mm radiator w/ push & pull dual (so 4 total) noiseblocker 1700rpm fans
no reservoir

Right now the radiator/fan stack is 82mm tall w/ 25mm fan - 31.3mm radiator - 25mm fan (w/ some spacer room). I could conceivably go w/ a thicker (gtx-sized) radiator if I got rid of two of the fans and just went either push or either pull... but I seem to remember that GTX-thick rads demand push+pull

thanks in advance!

 

[Tsumi]

A GT stealth with push/pull is better than a GTX with only push or pull.

A 2x140 radiator is nowhere near enough to cool that system pushed to it's max with 1700 rpm fans. You'll need at least 2500 rpm, if not 3000+ rpm fans. You're better off with stock cooling on the GPU and aftermarket heatpipe coolers on the CPU.

 

[jeremyshaw]

when you say, "not enough," what do you mean? Like not enough to get it down to 15C Delta to ambient, or not enough to even get 80C load temps? Cause I think he wanted silence over anything in this build? Based on fan choice.

 

[Machupo]

basically, I'm trying for a ridiculously small build, but don't want a hovercraft to make it happen so silence is nice, but I'll take recs: on parts to swap if it's physically(thermally?) possible

Size is the major constraint -- I'm literally building this box around the radiator (+4fans), gpu (+wb), mobo (w/ ram and minipcie ssd), and psu (unboxed)... the only other components (pump and tubing) can be crammed wherever. It just so happens that this dual 140mm rad fits perfectly (to within 1mm) in the space allowed (with a push/pull dual 140x25mm fans).

Now, I'm not 100% tied to watercooling, I'd have to widen the case design a bit for the dual-slot 6990 stock cooler, but that's just a single pull-tool operation I'd really like to do it if possible (think of it as more pushing the boundaries), but if it doesn't gain me anything over stock cooling i'll keep it air and drive on.

Thanks guys!

 

[Tsumi]

Dual GTX 275's (not overclocked) and a Phenom II 1090T (not overclocked) under simultaneous furmark and P95 netted me 65-70 C in ~20-25 C ambient temperatures on the GPU's, and 45-50 C on the CPU. On GT Stealth 3x140 radiator. Granted, I was using only 3 1500 RPM fans.

With a 2x140 radiator with 4 1700 RPM fans, you'll probably see temps close to stock temps. You might just see a 5-10 C improvement over stock, but that's about it. Not really worth it, just stick with stock. Or get an air cooler for the CPU, and run a GPU water loop only.

 

[jeremyshaw]

Dual GTX 275's (not overclocked) and a Phenom II 1090T (not overclocked) under simultaneous furmark and P95 netted me 65-70 C in ~20-25 C ambient temperatures on the GPU's, and 45-50 C on the CPU. On GT Stealth 3x140 radiator. Granted, I was using only 3 1500 RPM fans.

With a 2x140 radiator with 4 1700 RPM fans, you'll probably see temps close to stock temps. You might just see a 5-10 C improvement over stock, but that's about it. Not really worth it, just stick with stock. Or get an air cooler for the CPU, and run a GPU water loop only.

I think his point was silence, like what cj3waker and I did for our mITX builds (120 rad cooling CPU & GPU). Of course, neigther of us got silence, but that's another issue alltogether (I ended up loving MSI's TWIN FROZR design, and he decided to put up with the noise).

 

[Machupo]

Dual GTX 275's (not overclocked) and a Phenom II 1090T (not overclocked) under simultaneous furmark and P95 netted me 65-70 C in ~20-25 C ambient temperatures on the GPU's, and 45-50 C on the CPU. On GT Stealth 3x140 radiator. Granted, I was using only 3 1500 RPM fans.

With a 2x140 radiator with 4 1700 RPM fans, you'll probably see temps close to stock temps. You might just see a 5-10 C improvement over stock, but that's about it. Not really worth it, just stick with stock. Or get an air cooler for the CPU, and run a GPU water loop only.

hrmmm, so it might be possible i'd have to run the 6990 in ausum mode to beat out the dual 275's and i'd lose about 30w (non-overclocked) vs. the x6-1090t.... seriously making me want to try it

have to go with this radiator/fan setup or nothing -- the bottom fans will be parallel to the motherboard at the height of the top of ram sticks, so no room for a cpu cooler


maybe I should go with higher rpm fans on a rheostat so I have the headroom if I need it. what's a good fanbus that can handle 4x 140mm fans?

time to polish this design on sketchup!

 

[sok0]

You could use a good fan controller with temperature curves to only have the system loud during heavy loads like mine is. Mine runs on 2 900rpm fans until I start gaming and the water temps increase, then the other 4 kick on at from 900-1200 rpm's.